A throwaway address (also called disposable or burner) is a temporary inbox that someone creates to get past a sign-up form and then abandons within minutes or hours. They are designed to disappear.
Why they are marked do-not-send
Throwaway inboxes are designed to be temporary and are often abandoned quickly. Keeping them on a marketing list adds avoidable risk, so we mark addresses from known throwaway services do-not-send.
Note
We refresh our list of known throwaway providers every day because new ones appear all the time. This check is included in verification at no extra cost.
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